I have to make a project and my teacher ask us for h.w to find the size of model meaning model=planet. I searched on google and it only keep telling me the mass. Is the mass and the size the same?
Mars — Mass: 6.4185×1023 KG (0.107 Earths)
^^ is what they gave me. according to wikipedia. Please HELP!
2007-09-27 12:18:33 · 5 answers · asked by Ingrid P 1 in Science & Mathematics ➔ Astronomy & Space
lets make this easy
mass is the weight of the planet.
check for either a radius or a circumference
Equatorial = east to west
Meridional = north to south
if needed, do the necessary math to find a circumference from a radius
2 times R times pi = circumference
wiki lists
Mars Equatorial radius(R) = 3402.5 km ( 2114.21 miles )
Earths Equatorial circumference = 40,075.02 km
my results...............................
Mars Equatorial circumference
13283.97 miles
Earths Equatorial circumference
24901.5 miles
I believe circumferences are easy to use for making physical models. get 2 large pieces of paper. 1 is 1.87455 times bigger than the other. roll each one up into their own tubes and tape the edges together with some duct tape.
find or make paper/Styrofoam balls that will fit into the 2 tubes perfectly and you've got your mars and earth.
Ta-freakin-Da!!!
if confused about the radius of a sphere, then check this
http://graphcomp.com/info/specs/sgi/vrml/spec/Images/sphere.gif
mars is not a perfect sphere though. its called an Oblate sphere. like this one http://upload.wikimedia.org/wikipedia/commons/7/7b/OblateSpheroid.png
but we won't worry about that for now.
earth mars comparison
http://www.kidscosmos.org/kid-stuff/mars-trip-graphics/mars-earth.jpg
earth sun comparison
http://www.co-intelligence.org/newsletter/images/sun-etc.jpg
2007-09-27 12:43:11 · answer #1 · answered by Mercury 2010 7 · 0⤊ 0⤋
On wikipedia, there is a chart on the right for each planet, that has orbital characteristics as well as physical characteristics.
By size, most people mean "diameter". Diameter is twice the radius.
Mars' equatorial radius (according to that chart on wikipedia) is 3402.5 km, or .533 the radius of Earth.
Mars' polar radius is 3377 km.
Equatorial radii and polar radii are different for most planets due to the rotation of the planet - the greater speed of rotation at the equator causes the planet to "lift up" a bit (centrifugal force).
The greater the difference, the more "flattened" the planet appears. That difference (called or "oblateness" or "ellipticity") is also listed, for Mars its only .0076, which means its very close to a perfect sphere.
2007-09-27 12:27:33 · answer #2 · answered by Anonymous · 0⤊ 0⤋
No. The mass would only be proportional to size if the two bodies were equally dense.
And while this is not impossible, you would be taking a risk if you accepted the thought as fact.
I'm sorry, but I don't remember the actual size of Mars. But I think it's somewhere around 40% the diameter of Earth. Earth's diameter is about 8000 miles. From this you may be able to calculate a fairly accurate diameter for Mars.
2007-09-27 12:26:14 · answer #3 · answered by Robert K 5 · 0⤊ 0⤋
No mass is the amount of material in an object. If you have two planets that are the same size but one is more dense
( more material in a given space ) Then that one is more massive. Mars is about .4 planet ( Earth ) but about .6 Earths volume or size. The moon is about .1 Earth or planet unit.
2007-09-27 12:32:17 · answer #4 · answered by ? 3 · 0⤊ 0⤋
Mass is how "heavy" the planet is.
Google on "mars radius", and you will find that Mars has a radius of about 3400 km. Some places will list it as a little bit more, or less.
2007-09-27 12:25:21 · answer #5 · answered by morningfoxnorth 6 · 0⤊ 0⤋